A Novel Approach to Improve the Frequency Resolution Based on Sparse Representation

Wen Ming Gui; Rui Fan Liu; Guang Yi  Bai; Xi  Shao

doi:10.4028/www.scientific.net/AMR.756-759.3336

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 756-759A Novel Approach to Improve the Frequency...

A Novel Approach to Improve the Frequency Resolution Based on Sparse Representation

Abstract:

How to improve the frequency resolution, especially in the low frequency bands, is an important problem for many applications. A novel approach based on sparse representation was proposed for this problem. In this work, we first discussed the design of the over-completed dictionary with the high frequency resolution, and then Matching Pursuit was advised to perform sparse decomposition using Matching Pursuit Tool Kit. Next, the frequency information was extracted from the code book of the results of Matching Pursuit. Finally, the experiments demonstrated the improvement of the frequency resolution for the proposed approach.

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Periodical:

Advanced Materials Research (Volumes 756-759)

Pages:

3336-3340

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.756-759.3336

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Online since:

September 2013

Authors:

Wen Ming Gui, Rui Fan Liu, Guang Yi Bai, Xi Shao

Keywords:

Fast Fourier Transform (FFT), Frequency Resolution, Matching Pursuit, MPTK, Sparse Represantion

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